I just upgraded my desktop machine as a test case. Apart from trying SCHED_ULE the first time which hung after getting entropy for point_to_point, then switching back to SCHED_4BSD all went fine. I will be testing upgrading a couple servers later this evening. I am quite liking the idea of csup being in base now. No need to download ports to get cvsup-without-gui to then cvsup to latest ports then start getting stuff

can just csup and go

Though admittedly I've stopped cvsup'ing ports, just using portsnap now, but good to not need to install cvsup and ezm3 in order to update source

Been running it on one of my machines for a while now, the driver sk had a patch for some of the newer Marvell chipset based GigbitE cards, and it was not supported in 6.1. It is stable, it is fast, and so far has given me no problems at all.